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. 2021 Apr 27;10(9):1893. doi: 10.3390/jcm10091893

Table 3.

Continuous glucose monitor (CGM) vs serum glucose data for days 2–7.

CGM vs. Serum n = 183
Mean absolute difference (MAD) ± SD 14.7 ± 10.3
Mean absolute relative difference (MARD) 13.4%
Mean difference ± Standard Deviation 6.7 ± 16.7
Median difference (Interquartile Range) 9.0 (−4.0, 18.0)
Within ± 20 mg/dL 134 (73%)
Within ± 15 mg/dL 107 (58%)
Within ± 10 mg/dL 75 (41%)
%20/20 143 (78%)
%15/15 117 (64%)